Electrical Steering System Operator Notification via Preliminary Input
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Solution Overview
Problem
The existing electrical steering systems face safety challenges due to the delay in operator reaction time when interrupting automated steering movements, which can impair the safety and effectiveness of automated driving functions like lane keeping and emergency evasion.
Innovation Solution
The method involves notifying the operator of an impending automated steering movement by advancing the input position change in time and reducing the initial wheel position angle change, allowing earlier interruption or suspension of the automated steering, with the option to adjust timing based on driving state and conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automated steering movement is executed with the specified input position change profile and wheel position angle change profile, then the calculated vehicle trajectory is implemented, but the operator's reaction time is insufficient to interrupt the automated steering movement safely
Solution Approach 1:
The input position change is brought forward in time before the wheel position angle change, serving as a preliminary notification to the operator. This allows the operator to perceive the intended automated steering movement earlier and interrupt it if necessary, resolving the contradiction by providing advance warning without delaying the actual steering execution
Solution Approach 2:
The automated steering execution is segmented into two distinct phases: first the input position change (notification phase), then the wheel position angle change (execution phase). This segmentation allows the operator to respond to the first phase while the second phase provides the actual steering action, thereby improving safety without compromising trajectory implementation
2Reliability
If the input position change is brought forward in time and the wheel position angle change is reduced initially, then the operator can be notified earlier and interrupt the automated steering, but the automated steering execution is delayed
Solution Approach 1:
The elevated input position change serves as a preliminary notification that does not require full execution time. It prepares the operator for the upcoming automated steering movement while the actual wheel position angle change follows with the necessary timing to maintain trajectory accuracy
Solution Approach 2:
The system dynamically adjusts the steering execution by initially reducing the wheel position angle change and then applying the full required change. This dynamic adjustment allows time for operator notification and potential interruption while still achieving the necessary steering outcome for trajectory implementation
Data Source
AI summary
A method for operating an electrical steering system of a vehicle. The method includes: providing the electrical steering system, which has an input device, which can be operated by an operator of the vehicle by changing an input position, and a steering device, which implements a steering movement of the vehicle by changing a wheel position angle of at least one vehicle wheel of the vehicle; executing an automated steering movement, in which an input position change and a wheel position angle change take place, and for which a starting time point, an input position change profile, and a wheel position angle change profile are specified to implement a calculated vehicle trajectory of the vehicle. The operator is notified when the automated steering movement is executed in that one or more notification measures are carried out. An electrical steering system is also described.